CVE-2026-101338— Stack overwrite from a specially crafted and formatted SVCB or HTTPS RR
一分钟漏洞结论
影响对象
NLnet Labs NSD
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
When a SVCB or HTTPS RR has filled the wire format RDATA up to the brim, another ECH parameter may overwrite the stack, and once beyond the limit, the base64 decoder can write attacker controlled data of unlimited size. Zone files which are written out by NSD
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一、 漏洞 CVE-2026-101338 基础信息
漏洞信息
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Vulnerability Title
Stack overwrite from a specially crafted and formatted SVCB or HTTPS RR
来源: CVE Program / CVE List V5
Vulnerability Description
When a SVCB or HTTPS RR has filled the wire format RDATA up to the brim, another ECH parameter may overwrite the stack, and once beyond the limit, the base64 decoder can write attacker controlled data of unlimited size. Zone files which are written out by NSD itself, such as for zones for which the NSD instance is secondary, will not be formatted like this. The zone file must be fed to NSD directly, (but it could come, for example, from an operator controlled provisioning system).
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| NLnet Labs | NSD | 4.10.0 ~ 4.15.3 | - |
|
二、漏洞 CVE-2026-101338 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-101338 其他参考 (1)
-
https://www.nlnetlabs.nl/downloads/nsd/CVE-2026-101338.txt vendor-advisory
同批安全公告 · NLnet Labs · 2026-10-14 · 共 4 条
| CVE-2026-101337 | 8.7 HIGH | Stack overwrite from specially formatted base64 RDATA field |
| CVE-2026-101341 | 8.7 HIGH | Stack overwrite from specially formatted TXT-DATA RDATA field |
| CVE-2026-101339 | 8.7 HIGH | Stack overwrite from a specially crafted and formatted HIP RR |
IV. Related Vulnerabilities
Same product: NSD
-
CVE-2026-101341
Stack overwrite from specially formatted TXT-DATA RDATA fiel -
CVE-2026-101339
Stack overwrite from a specially crafted and formatted HIP R -
CVE-2026-101337
Stack overwrite from specially formatted base64 RDATA field -
CVE-2026-19538
NLnet Labs NSD 授权问题漏洞 -
CVE-2026-19401
NLnet Labs NSD 异常处理不当漏洞
Same vendor: NLnet Labs
Same weakness: CWE-121
-
CVE-2026-76655
HPE NonStop SNMP Trap Multiplexer - Buffer Overflow vulnerab -
CVE-2026-101341
Stack overwrite from specially formatted TXT-DATA RDATA fiel -
CVE-2026-101339
Stack overwrite from a specially crafted and formatted HIP R -
CVE-2026-101337
Stack overwrite from specially formatted base64 RDATA field -
CVE-2026-73795
HPE NonStop TMF Auditread2 - Denial of Service vulnerability
V. Comments for CVE-2026-101338
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